Household/Metric Conversion 1 kilogram 1,000 grams 1 liter ...
[Pages:6]Nursing 131 Household to Metric Conversion
Slide 2 & 3
Household/Metric Conversion
In the metric system liquid volumes are measured in milliliters or liters. Weight is measured in micrograms, milligrams, grams, or kilograms.
1 liter
1000 milliliter
1 kilogram
1,000 grams
1,000,000 milligrams
1,000,000,000 micrograms
Household/Metric Conversion
In the household system liquid volumes are measured in quarts, pints, cups, tablespoons, and teaspoons. Weight is measured in ounces & pounds.
1 quart
2 pints
4 cups 64
192
tablespoons teaspoons
16 ounces 1 pound
Nursing 131 Household to Metric Conversion
Slide 4 & 5
Example One
Household/Metric Conversion
Our First Example Problem: 2 ? teaspoons of cough medicine has been prescribed. A measuring device marked in ml is being used. How many ml should be administered?
Household/Metric Conversion
Here are the 5 basic steps to change from one unit to another
Step 1 - Identify that you need to convert Step 2 ? Write down what you have Step 3 ? Write down your equivalent fraction Step 4 ? Reduce units Step 5 ? Perform the math
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Nursing 131 Household to Metric Conversion
Slide 6
Solution to Example One
Metric/Household Conversion
Our Example Problem: 2 ? teaspoons of cough medicine has been prescribed. A measuring device marked in ml is being used. How many ml should be administered?
Step 1 Identify you need to convert The question asks how many of one unit should we prepare in another type of unit.
Step 2 Write down what you have The quantity we have ? our known quantity - is 2 ? tsp. (teaspoons)
HoWursitee hthios lads/aMfraecttiornicwiCtho1nonvethresbioottnom.
Our Example Pro2b?lemtsp: 2 ? teaspoons o1f cough medicine has been prescribed. A measuring device marked in ml is being used. How many ml (Wrsithinogutlhdebaemaodumntinaisstaerfreadc?tion will help us when we multiply later.)
Step 3 Relate the units An equivalency chart will list how the units relate.
Household/Metric Conversion
Conversions between Household and Metric Units
1 quart
1 liter (l)
1 pint
500 milliliters (ml)
1 cup
240 milliliters (ml)
H1 ofluuisdeohuonclde /M(oez.t)ric Conve3r0s-3io2 nmilliliters (ml)
1 tablespoon (tbsp.) Step 3 Relate the units
1 teaspoon (tsp.)
15 milliliters (ml) 5 milliliter (ml)
2.2 pound (lbs)
1 kilogram (kg)
We now have:
2 ? tsp
5 ml
X
1
1 tsp
HouTosceohnvoelrdt w/eMwiell ntereicd tCo omnulvtipelyrosuior fnractions.
Step 4 Reduce the units Cross off any matching pairs of unit labels. The label left should be what you want to find.
We now have:
2 ? tsp
5 ml
x
Household/M1etric Conv1etsrpsion
Step 5 Perform the math
2 ? tsp
5 ml
x
1
1 tsp
In this example th2e?onxly5unit left1is2.m5 l which is wh(Ratewduecweaanntytofraficntdio. ns.)
1 x 1
1
12.5 ml
2 ? teaspoons is equivalent to 12.5 ml.
If you're having difficulty with the mixed number (2 ?), you may want to watch the Operations with Mixed Numbers tutorial.
Nursing 131 Household to Metric Conversion
Slide 14
Example Two
Household/Metric Conversion
Our Second Example Problem: A child weighs 24 lbs, 14 oz. You determine that 24 lbs., 14 oz. is equivalent to ______ kg.
_____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ __________
Nursing 131 Household to Metric Conversion
Slide 15-19 Solution to Example Two
Household/Metric Conversion
Our Second Example Problem:
A child weighs 24 lbs, 14 oz. You determine that 24 lbs., 14 oz. is equivalent to ______ kg.
Step 1 Identify you need to convert The key words that indicate we need to convert are "equivalent to."
Step 2 Write down what you have
The quantity we have is in 2 different units. We have 24 lbs and we have
14 oz. We first change the 14 oz to lbs by dividing by 16.
HoWuestheehnoadldd t/hMis toetthreic24Clbos.nUvseerasciaolcnulator or long division to change the 14/16 to a decimal. We can then write this as a fraction with 1 on the
OboutrtoSme.cond Ex1a4mple Problem: A child weighs 24 +lb2s,414 oz.=Yo2u4.d8e7t5ermine that 242l4b.s8.7, 514 oz. is
equivalent 1to6 ______ kg.
1
Step 3 Relate the units An equivalency chart will list how the units relate.
Household/Metric Conversion
Conversions between Household and Metric Units
1 quart
1 liter (l)
1 pint
500 milliliters (ml)
1 cup
240 milliliters (ml)
1 fluid ounce (oz.)
30-32 milliliters (ml)
1 tablespoon (tbsp.)
15 milliliters (ml)
1 teaspoon (tsp.)
5 milliliter (ml)
2H.2opuosuenhdo(llbds/)Metric Conv1ekrisloiogrnam (kg)
Step 3 Relate the units
An equivalency chart will list how the units relate.
Our chart lists 1 kg = 2.2 lbs.
We will write this equivalency as a fraction.
We can write this fraction 2 ways:
1 kg__ or
2.2 lbs
2.2 lbs 1 kg
HoBfuraescctaeiouhnseomtluhdset/fhrMaacvteeioltnbrswiocenwCthrooetenboivnttesotmresp. i2ohnas lbs on the top, our next
Step 3 Relate the units
We now have:
24.875 lbs x
1
1 kg__ 2.2 lbs
To convert we will need to multiply our fractions.
Nursing 131 Household to Metric Conversion
Slide 20-21
Solution to Example Two (Continued)
Household/Metric Conversion
Step 4 Reduce the units Cross off any matching pairs of unit labels. The label left should be what you want to find.
We now have:
24.875 lbs x
1
1 kg__ 2.2 lbs
In this example the only unit left is kg which is what we want to find.
Household/Metric Conversion
Step 5 Perform the math
24.875 lbs x
1
1 kg__ 2.2 lbs
24.875 x 1 = _24.875_
1 x 2.2
2.2
(Reduce any fractions.)
11.30682 kg
When converting from lbs to kg ? round your result to the nearest tenth.
24 lbs, 14 oz. is equivalent to 11.3 kg.
Nursing 131 Household to Metric Conversion
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